Delete a Field From DataBase

  <a href="delete.php?delid=<?php echo $id; ?>">delete</a>

<?php
         if($_GET["delid"]!="")
        {
            $delid=$_GET["delid"];
            $querySelect="delete from project where id=$delid";
            $resultSelect=mysql_query($querySelect);
            require  "projectlist.php";
   
        }
?>